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Hierarchically porous carbons derived from MOF/chitosan composites for high-performance supercapacitor.

08:00 EDT 9th April 2019 | BioPortfolio

Summary of "Hierarchically porous carbons derived from MOF/chitosan composites for high-performance supercapacitor."

Hierarchically porous carbon materials with high surface areas are hopeful candidates for energy storage and conversion. Herein, we present the facile synthesis of hierarchically porous carbons through the calcination of meta-organic framework (MOF)/chitosan composites. The effects of chitosan (CS) addictive on the pore structures of resultant carbons were discussed. The corresponding MOF/chitosan precursors could be readily converted into hierarchically porous carbons (NPC-V, V = 1, 2, 4, and 6) with much higher ratios of meso-/macropore volume to micropore volume (Vmeso-macro/Vmicro). The derived carbon NPC-2 with the high ratio of Vmeso-macro/Vmicro = 1.47 demonstrates a high specific surface area of 2375 m2 g-1, and a high pore volume of 2.49 cm3 g-1, as well as a high graphitization degree, comparison with its counterpart (NPC) without chitosan addition. These excellent features are favorable of rapid ion diffusion/transport, endowing NPC-2 with enhanced electrochemical behaviors as supercapacitor electrodes in a symmetric-electrode system, corresponding to a high specific capacitance of 199.9 F g-1 in the aqueous electrolyte and good rate capability. The good cycling stability is also observed after 10 000 cycles.

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This article was published in the following journal.

Name: Chemistry, an Asian journal
ISSN: 1861-471X
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